stdenv: Add hack to fix cmake canExecute cross-compilation #251853
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Artturin
added
the
6.topic: cross-compilation
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Fixes `pkgsCross.musl64.llvmPackages_16.clang.cc` on `x86_64-linux`, which used to fail with `/bin/sh: clang-tblgen: not found`. Same hack is used in other projects: https://github.com/search?q=%2FCMAKE_CROSSCOMPILING_EMULATOR.%2B%5C%2Fusr%5C%2Fbin%5C%2Fenv%2F+NOT+is%3Afork&type=code Comment from https://github.com/vsrinivas/fuchsia/blob/30435a9d0f0b67c94e3c70760b522c9f7fbbd6be/build/cmake/HostLinuxToolchain.cmake#L64 > Required to run host Linux executables during the build itself. > An example would be https://gitub.com/KhronosGroup/Vulkan-Loader and > its "asm_offset" program. > > NOTE: Alternatives have been tried unsuccessfully, i.e.: > > With $(set CMAKE_CROSSCOMPILING_EMULATOR), the build fails because > the CMake ninja/Make script tries to find the executable in the current > path, as in: > > [3/16] Generating gen_defines.asm > FAILED: loader/gen_defines.asm > cd /tmp/cc/build-Vulkan-Loader/loader && asm_offset GAS > /bin/sh: asm_offset: command not found > ninja: build stopped: subcommand failed. > > With $(set CMAKE_CROSSCOMPILING_EMULATOR ""), the build fails because > the shell cannot find the "" program as in: > > [3/16] Generating gen_defines.asm > FAILED: loader/gen_defines.asm > cd /tmp/cc/build-Vulkan-Loader/loader && "" /tmp/cc/build-Vulkan-Loader/loader/asm_offset GAS > /bin/sh: : command not found > ninja: build stopped: subcommand failed. > > It seems that the root of the problem comes from how the CMake function > cmCustomCommandGenerator::GetArgc0Location() computes the target > executable's location. At this point it's unclear whether this is a CMake > bug or a feature. Risicle discovered this hack. Co-authored-by: Robert Scott <code@humanleg.org.uk>
Mindavi
approved these changes
Sep 1, 2023
|
Tests are failing now: |
13 tasks
alyssais
added a commit
to alyssais/nixpkgs
that referenced
this pull request
Feb 2, 2024
Fixes e.g. pkgsStatic.libjpeg_turbo. Link: NixOS#251853 (comment)
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Fixes
pkgsCross.musl64.llvmPackages_16.clang.cconx86_64-linux, which used to fail with/bin/sh: clang-tblgen: not found.Same hack is used in other projects:
https://github.com/search?q=%2FCMAKE_CROSSCOMPILING_EMULATOR.%2B%5C%2Fusr%5C%2Fbin%5C%2Fenv%2F+NOT+is%3Afork&type=code
Comment from https://github.com/vsrinivas/fuchsia/blob/30435a9d0f0b67c94e3c70760b522c9f7fbbd6be/build/cmake/HostLinuxToolchain.cmake#L64
Risicle discovered this hack.
Description of changes
Things done
sandbox = trueset innix.conf? (See Nix manual)nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage./result/bin/)